When it comes to the architecture of the human genome, it’s only a matter of time before harmful genes — genes that could compromise future generations — arise in a population. These mutations accumulate in the gene pool, primarily affected by a population’s size and practices like marrying within a small community. New research published in the Proceedings of the National Academy of Sciences (PNAS) journal provides rare direct evidence showing that increased homozygosity — meaning two identical alleles in a genome — leads to negative effects on fertility in a human population.
In testing the genetic material of current populations in Africa and comparing against existing fossil evidence of early Homo sapiens populations there, researchers have uncovered a new model of human evolution — overturning previous beliefs that a single African population gave rise to all humans.
The transition of human societies from hunter-gatherers to farmers and pastoralists is a more nuanced process than generally thought, according to a new study of peoples living in the highlands of southwest Ethiopia. The work was published March 9 in Current Biology.
UC Davis Global Affairs awarded grants to four College of Letters and Science faculty for international projects focused on renewable energy, biodesign, tuberculosis and democracy.
Jesús M. Velázquez,assistant professor of chemistry, and colleagues at UC Davis and in Mexico received a $7,500 award from a Global Affairs grant program aimed at achieving the United Nations Sustainable Development Goals.
Study finds that a gene for lighter skin spread rapidly among people in southern Africa in the last 2,000 years. University of California, Davis, researchers and colleagues report that the gene was introduced from eastern Africa to southern African populations. Strong positive selection caused this gene to rise in frequency among some KhoeSan populations.
